This 1902 Stoughton golf ball is made from solid WHITE gutta percha.  This ball is detailed in the July 1902 issue of Golf (NY) on page 52 as follows:

"Still another golf-ball, bas made its appearance on the market. The latest arrival, the ‘ Stoughton,' manufactured by the Stoughton Rubber Company of Boston, is composed entirely of gutta, and differs from other balls in that all foreign matter has been removed by a series of special refining processes. Not only is the ball more resilient on account of the purity of the stock, thereby giving greater driving qualities, but it can be better controlled in approaching and on the green. The removal of all water and resin enables the ball to be seasoned in a very short space of time, and affords better adhesive qualities for the paint. While a final point in its favor is the fact that it is pure white throughout.”

Truth be told, if it was pure white throughout, it did not remain that way for long.  White gutta percha was actually more yellow than white, so the ball still needed to be painted.  You can see the yellow of the white gutta percha where the paint is chipped off this ball, tiny as those chips are. 

This Stoughton ball shows little to no use, and would make a fabulous addition to any ball collection.